Chapter 3. Getting started

This chapter guides you through the steps to set up your environment and run a simple messaging program.

3.1. Prerequisites

3.2. Running Hello World

The Hello World example calls createConnection() for each character of the string "Hello World", transferring one at a time. Because AMQ JMS Pool is in use, each call reuses the same underlying JMS Connection object.

Procedure

  1. Use Maven to build the examples by running the following command in the <source-dir>/pooled-jms-examples directory.

    $ mvn clean package dependency:copy-dependencies -DincludeScope=runtime -DskipTests

    The addition of dependency:copy-dependencies results in the dependencies being copied into the target/dependency directory.

  2. Use the java command to run the example.

    On Linux or UNIX:

    $ java -cp "target/classes:target/dependency/*" org.messaginghub.jms.example.HelloWorld

    On Windows:

    > java -cp "target\classes;target\dependency\*" org.messaginghub.jms.example.HelloWorld

Running it on Linux results in the following output:

$ java -cp "target/classes/:target/dependency/*" org.messaginghub.jms.example.HelloWorld
2018-05-17 11:04:23,393 [main           ] - INFO  JmsPoolConnectionFactory       - Provided ConnectionFactory is JMS 2.0+ capable.
2018-05-17 11:04:23,715 [localhost:5672]] - INFO  SaslMechanismFinder            - Best match for SASL auth was: SASL-ANONYMOUS
2018-05-17 11:04:23,739 [localhost:5672]] - INFO  JmsConnection                  - Connection ID:104dfd29-d18d-4bf5-aab9-a53660f58633:1 connected to remote Broker: amqp://localhost:5672
Hello World

The source code for the example is in the <source-dir>/pooled-jms-examples/src/main/java directory. The JNDI and logging configuration is in the <source-dir>/pooled-jms-examples/src/main/resources directory.